GB2076464A

GB2076464A - Oscillating bearing

Info

Publication number: GB2076464A
Application number: GB8115404A
Authority: GB
Original assignee: Torrington Co
Current assignee: Timken US LLC
Priority date: 1980-05-23
Filing date: 1981-05-20
Publication date: 1981-12-02
Also published as: AU6803581A; GB2076464B; CA1142987A; DE3116855C2; IT1136997B; JPS5718811A; FR2483023A1; AU527935B2; SE8101513L; FR2483023B1; US4314732A; DE3116855A1; BR8103243A; IT8121902A0; JPS6030847B2

Description

1

SPECIFICATION Oscillating bearing

This invention relates to oscillating anti-friction bearings. More particularly, this invention relates to an oscillating bearing for a stud mount. 70 According to the present invention, an oscillating bearing for a stud mount comprises an arcuate inner raceway; an arcuate outer raceway; an arcuate retainer between said raceways, the inner raceway, the outer raceway and the retainer having aligned openings for receiving the stud, said retainer having arcuate roller pockets on each side of said retainer opening and spaced from said retainer opening; and a plurality of rollers located in each roller pocket.

The oscillating bearing to be described herein thus uses only the arcuate bearing surfaces necessary to handle an oscillating mechanism rather than the conventional complete 3601 radial bearing. One particular use of this new oscillating bearing is with valve train rocker arms used on internal combustion engines.

The invention, will be further described, by way of example, with reference to the drawings, in which:

Fig. 1 is a side elevational view, partly in section, showing an oscillating bearing used with a rocker arm; Fig. 2 is a longer scale view, partly in section, of the oscillating bearing shown in Fig. 1 with the 95 rocker arm removed; Fig. 3 is a view, partly in section, taken generally along lines 3-3 of Fig. 2; Fig. 4 is a perspective view of the inner raceway of the bearing; Fig. 5 is a perspective view of the retainer of the bearing;and Fig. 6 is a perspective view of the outer raceway of the bearing.

Referring to the drawings, and more particularly, to Fig. 1, an automobile engine valve train rocker arm 10 is mounted on a stud 12 for oscillatory movement in the direction of the arrows shown in Fig. 1 and Fig. 2. Stud 12 extends through a bore formed through inner raceway support 14 which is firmly secured in place by means of nut 18. The stud 12 extends through the oscillating bearing and through an opening 20 extending through the bottom of the rocker arm, and is usually secured to the cylinder head (not shown) by a press fit or is threaded in place.

The lower surface of inner raceway support 14 is arcuate. As shown more particularly in Fig. 2, the oscillating bearing includes an arcuate inner raceway 22, an arcuate raceway outer raceway 24 and an arcuate retainer 26 between the inner raceway 22 and the outer raceway 24. A retention means extends downwardly from the centre of the inner raceway 22. The retention means extends through opening 30 in retainer 26 and also extends through opening 32 in outer raceway 24. The retention means may take many forms. As shown more particularly in Fig. 3 and Fig. 4, the GB 2 076 464 A 1 retention means in the preferred embodiment includes two formed, generally rectangular members 34 and 36 extending from the centrally located stud opening 38 of the inner raceway. The members 34 and 36 lie diametrically opposite one another and extend parallel to the longitudinal axis of inner raceway 22.

Projections 35 and 37 extend outwardly from the ends of rectangular members 34 and 36, respectively, and parallel to the longitudinal axis of inner raceway 22. The projections provide shoulders (see Fig. 3) which are adapted to engage the outer surface of outer raceway 24. Thus, the retention means including the projections is adapted to unitize the inner raceway, retainer, rollers, and outer raceway while at the same time allowing the outer raceway 24, retainer 26, and rollers 40 to oscillate in the oscillating direction.

The stud opening 38 in the inner raceway 22 is aligned with the opening 30 in the retainer 26 and the opening 32 in the outer raceway 24.

As shown in Fig. 5, the retainer 26 has arcuate roller pockets 42 longitudinally equally spaced from the retainer opening 30. The arcuate roller pockets are long enough in the oscillating direction to receive a plurality of rollers 40 as clearly shown in Fig. 2.

In operation, as the rocker arm 10 oscillates relative to the stud 12, the inner raceway 22 remains fixed, the retainer 26 oscillates through a predetermined angle of say about 161, in the direction of oscillation, and the outer raceway 24 oscillates through a greater predetermined angle of say about 300. Thus, stud opening 30 in the retainer 26 is longer in the oscillating direction than the stud opening 38 in the inner raceway 24 is longer in the oscillating direction than the stud opening 30 in the retainer 26.

Another very important function of the arrangement and dimensions of the openings 30 and 32 and the provision of the plurality of rollers 40 in the roller pockets 42 of the retainer 26 is that, during oscillation of the bearing, the load zone is always properly located. Also, maximum capacity in the load zone is accomplished by using a full complement of rollers rather than cage bar separated rollers. The proper alignment of the rollers is accomplished by the two end rims 44 of the retainer 26 and the surface 46 forming the longitudinal ends of the pockets 42 (see Fig. 5).

Claims

1. An oscillating bearing for a stud comprising: an arcuate inner raceway; an arcuate outer raceway; an arcuate retainer between said inner raceway and said outer raceway, the inner raceway, the outer raceway and the retainer having aligned openings for receiving the stud, said retainer having an arcuate roller pocket on each side of said retainer opening and spaced from said retainer opening; and a plurality of rollers located in each roller pocket.

2. An oscillating bearing as claimed in claim 1, wherein retention means extend from the inner 2 GB 2 076 464 A 2 raceway, through the retainer opening, and through the outer raceway opening, said retention means being adapted to unitize the inner raceway, retainer, rollers, and outer raceway.

3. An oscillating bearing as claimed in claim 2, wherein the retention means includes projections, each having a surface adapted to engage the outer surface of the outer raceway in a manner to permit oscillating movement of the outer raceway and retainer; and wherein the retainer opening is longer in the oscillating direction than the length of the inner raceway opening in said oscillating direction, and the outer raceway opening is longer in the oscillating direction than the retainer opening, so that, during oscillation of the bearing, the load zone is always properly located.

4. An oscillating bearing constructed substantially as herein described with reference to and as illustrated in the drawings.

Printed for Her Majesty's Stationery Office by the Courier Press, Leamington Spa, 1981. Published by the Patent Office, 25 Southampton Buildings, London, WC2A IlAY, from which copies may be obtained.